Funny, everything written by Dan Brown doesn't have enough substance.
Did I just make a pun about writing utensils and poop, based on a popular idiom? Yes. Yes I did. You're welcome.
While it may be lighter, cardboard is a tad weaker than fiberglass.
Spinners might be a better option. His hands must be getting... tired.
Also have no idea what money laundering is (see Office Space) so again, thinking of this from now on.
If you start to get claustrophobic, just take a few deep breaths.
Apropos of the previous post, maybe he too is expecting a flood and invested in a propeller conversion kit.